<style>
        img{
            width: 850px;
            height: 500px;
        }
    </style>

    <img src="./img/5.png" src-real="./img/1.webp" alt=""><br>
    <img src="./img/5.png" src-real="./img/2.webp" alt=""><br>
    <img src="./img/5.png" src-real="./img/3.webp" alt=""><br>
    <img src="./img/5.png" src-real="./img/4.webp" alt=""><br>
    
    lazyLoad()
        window.onscroll = lazyLoad;